Mike Parker Pearson is Professor of British Later Prehistory at the Institute of Archaeology, University College London. A distinguished prehistorian, he has been involved with many major projects, including leading the recent Stonehenge Riverside Project. Joshua Pollard is a Professor of Archaeology at the University of Southampton. He has wide-ranging research interests in the Neolithic period and has directed and co-directed major fieldwork projects in the Avebury and Stonehenge landscapes. Colin Richards is Professor of World Prehistory in the Deaprtment of Archaeology at the University of Manchester where he mainly specialises in Neolithic archaeology, architecture and monumentality and ethnoarchaeology, with specific interests in Orkney and Easter Island. Julian Thomas is Professor of Archaeology at the University of Manchester. He is a leading expert on Neolithic Britain, and has directed excavations in many parts of Britain from Scotland to southern England. His books include Understanding the Neolithic, Time, Culture and Identity, and The Birth of Neolithic Britain. Kate Welham is Professor of Archaeological Science at Bournemouth University. She has worked on projects in Britain, Kenya, Spain and Easter Island, and is a leading expert in geophysical survey as well as in archaeological materials. She is chair of the UK committee of archaeological heads of departments. She is co-author of Stonehenge: making sense of a prehistoric mystery.